Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1988-08-11
1989-05-23
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307356, 307494, 307511, 307522, 328155, 329145, H03K 500, H03K 112, H03K 3023, H03K 1986
Patent
active
048333409
ABSTRACT:
A phase shifter includes two phase shift circuits connected in parallel with each other between an input terminal for a signal of a voltage e.sub.i and ground and each consisting of a series circuit of a resistor and a capacitor, first and second differential amplifiers for receiving at their first terminals voltages e.sub.1 and e.sub.2 of junctions between the resistors and the capacitors of the phase shift circuits and for receiving input signals at the second input terminals, the collectors of noninverting and inverting transistors of the first differential amplifier being connected to the collectors of inverting and noninverting transistors of the second amplifier, respectively, thereby obtaining a vector sum e.sub.0 of e.sub.1 and e.sub.2, and a third differential amplifier consisting of two transistors having the first and second differential amplifiers as loads at their collector sides, respectively, and capable of arbitrarily changing a phase shift between the input signal e.sub.i and the output e.sub.0 in accordance with a voltage difference between the signals supplied to the bases of the two transistors.
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Miller Stanley D.
NEC Corporation
Thai Nancy
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